<div id="container" class="container">
  <section id="content">
    <form action="">
      <h1>管理员登录</h1>
      <div>
        <input id="username" type="text" placeholder="用户名" required="" value="admin" />
      </div>
      <div>
        <input id="password" type="password" placeholder="密码" required="" value="123456" />
      </div>
      <div class="">
        <span class="help-block u-errormessage">&nbsp;</span> </div>
      <div>
        <input id="loginBtn" type="submit" value="登录" class="btn btn-primary" />
        <a id="forgetPwdMethod">忘记密码?</a>
      </div>
    </form>
    <!-- form -->
  </section>
  <!-- content -->
</div>
